Add German made, Dachstein (rebadged Ortovox) shrunken wool mitts to the list of disappearing archival products. Ten years ago, you could purchase these heavy duty mitts (a layering staple for mountaineers and ice climbers) at REI. Now, if you want a pair, you must mail order them from the UK/Germany or conduct a pleading email correspondence with US distributor Ortovox. Most of the message boards and google searches suggest vendor links that are either broken or out of business.
Archival Mitts: Dachstein/Ortovox
Lynne F’s glove system (refab mitts with Dachstein liners)